1388317 has 12 divisors (see below), whose sum is σ = 1672380. Its totient is φ = 1147776.

The previous prime is 1388297. The next prime is 1388323. The reversal of 1388317 is 7138831.

It can be written as a sum of positive squares in 2 ways, for example, as 1058841 + 329476 = 1029^2 + 574^2 .

It is not a de Polignac number, because 1388317 - 2¹⁹ = 864029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388327) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 933 + ... + 1909.

It is an arithmetic number, because the mean of its divisors is an integer number (139365).

2^1388317 is an apocalyptic number.

It is an amenable number.

1388317 is a deficient number, since it is larger than the sum of its proper divisors (284063).

1388317 is an equidigital number, since it uses as much as digits as its factorization.

1388317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1013 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 1388317 is about 1178.2686450891. The cubic root of 1388317 is about 111.5568425941.

The spelling of 1388317 in words is "one million, three hundred eighty-eight thousand, three hundred seventeen".